CN113020253A - Method for solving wave bending of finished hot-rolled ribbed steel bar - Google Patents
Method for solving wave bending of finished hot-rolled ribbed steel bar Download PDFInfo
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- CN113020253A CN113020253A CN202110221752.0A CN202110221752A CN113020253A CN 113020253 A CN113020253 A CN 113020253A CN 202110221752 A CN202110221752 A CN 202110221752A CN 113020253 A CN113020253 A CN 113020253A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention relates to the technical field of steel rolling, in particular to a method for solving the problem of wavy bending of a finished hot-rolled ribbed steel bar product, which comprises the following steps: step one, increasing the number of transverse ribs in the middle of one side character rolled with a character, and standardizing the size of the character to enable one character to occupy one transverse rib position; secondly, setting the preset height, the preset length, the preset width and the preset interval of the character to be rolled according to the height, the length, the width and the interval of the transverse ribs; thirdly, calculating the volume V1 of the transverse rib of the steel bar and the volume V2 of the character to be rolled; fourthly, comparing the sizes of V1 and V2, and if V1 is equal to V2, grooving and rolling the characters according to the preset height, the preset length, the preset width and the preset interval of the characters; if V1 is not equal to V2, the height, width and spacing of the characters are adjusted in sequence within a range that allows adjustment of the scale. The method provided by the invention can eliminate the phenomenon that the lettering position on the steel bar after the cold bed is bent by waves.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a method for solving the problem of wavy bending of a finished hot-rolled ribbed steel bar product.
Background
With the continuous development of the production technology of the hot-rolled ribbed steel bar, the product quality requirement of a user on the steel bar is stricter and stricter. However, in actual production, the straight steel bar often has a wavy bending phenomenon which is fluctuated along the length direction, the requirement of the GB/T1499.2-2018 on the bending degree of the straight steel bar is not met, the appearance quality of a product is unqualified, the use requirement of a user is not met, and the adverse effect is brought to the brand image of a company. The research shows that the place where the wave bending is generated is mainly at the steel seal position on the surface of the steel bar, the bending is mainly caused by the difference of the mobility of rolling metal on the upper surface and the lower surface of the steel seal position, and the wave bending phenomenon is eliminated by optimizing the hole pattern design and the arrangement of characters and transverse ribs.
Disclosure of Invention
The invention aims to provide a method for solving the problem of wavy bending of a finished hot-rolled ribbed steel bar.
The invention is realized by the following technical scheme:
a method for solving the wave bending of a finished hot-rolled ribbed steel bar product comprises the following steps of:
the method comprises the following steps that firstly, the number of transverse ribs is increased in the middle of one side character rolled with a character, the distribution arrangement of the character and the transverse ribs is optimized, two transverse ribs are arranged between steel and trademark characters, two transverse ribs are arranged between a trademark and specification characters, two transverse ribs are arranged between the specification and a three-position character after a production license, the size of the character is regulated, and one character occupies one transverse rib;
secondly, setting the preset height, the preset length, the preset width and the preset interval of the character to be rolled according to the height, the length, the width and the interval of the transverse ribs specified by the national standard design;
thirdly, calculating the volume V1 of the transverse rib of the reinforcing steel bar of each specification, and calculating the volume V2 of the character to be rolled according to the preset height, the preset length and the preset width of the character to be rolled;
fourthly, comparing the sizes of V1 and V2, and if V1 is equal to V2, grooving and rolling the characters according to the preset height, the preset length, the preset width and the preset interval of the characters; if V1 is not equal to V2, the height, width and spacing of the characters are adjusted in sequence within the range of the allowable adjustment ratio until V1 is equal to V2, and then the characters are grooved and rolled according to the adjusted height, width and spacing of the characters.
Preferably, the preset height of the characters is 0.6-1.0 times of the height of the transverse ribs, the preset length is 0.7-1.0 times of the length of the transverse ribs, the preset width is 0.8-1.5 times of the width of the transverse ribs, and the preset interval is 1.3-2.0 times of the interval of the transverse ribs.
Optimally, the allowable adjustment ratios of the character height, the character width and the character spacing are +/-20%, +/-25%, +/-50%, respectively.
Further, when the size error of V2 is within ± 10% as compared with V1, the characters can be grooved and rolled without adjusting the height, width and pitch of the characters.
Further, if V1 is not equal to V2 and exceeds the error range, the character height, width and spacing are sequentially adjusted, the height of the character is adjusted first, and when V1 is equal to V2 within the allowable range by adjusting the height, the other parameters are not adjusted.
The invention has the advantages of
The method for solving the problem of wavy bending of the finished hot-rolled ribbed steel bar has the following advantages:
according to the scheme, the number of the transverse ribs is increased among the characters, the sizes of the characters are unified, the size of the characters is determined, the equal size of the characters and the size of the transverse ribs is determined, the bending degree of the finished steel bar products of all specifications can be controlled within a national standard range, the maximum bending degree does not exceed 0.2%, the whole appearance of the finished cold bed product is not provided with an obvious wave bending site, the problem that the bent part of the steel bar is easy to generate waves at the lettering position is fundamentally solved, the method is suitable for the ribbed steel bars of all specifications in specific models, the method is simple and easy to operate, and meanwhile, the appearance quality of the.
Detailed Description
A method for solving the wave bending of a finished hot-rolled ribbed steel bar product comprises the following steps of:
the method comprises the following steps that firstly, the number of transverse ribs is increased in the middle of one side character rolled with a character, the distribution arrangement of the character and the transverse ribs is optimized, two transverse ribs are arranged between steel and trademark characters, two transverse ribs are arranged between a trademark and specification characters, two transverse ribs are arranged between the specification and a three-position character after a production license, the size of the character is regulated, and one character occupies one transverse rib; the metal flow difference between the lettering surface of the finished product pass reinforcing steel bar and the opposite surface of the lettering surface can be improved, and the bending phenomenon is reduced.
Secondly, setting the preset height, the preset length, the preset width and the preset interval of the character to be rolled according to the height, the length, the width and the interval of the transverse ribs specified by the national standard design;
thirdly, calculating the volume V1 of the transverse rib of the reinforcing steel bar of each specification, and calculating the volume V2 of the character to be rolled according to the preset height, the preset length and the preset width of the character to be rolled;
fourthly, comparing the sizes of V1 and V2, and if V1 is equal to V2, grooving and rolling the characters according to the preset height, the preset length, the preset width and the preset interval of the characters; if V1 is not equal to V2, the height, width and spacing of the characters are adjusted in sequence within the range of the allowable adjustment ratio until V1 is equal to V2, and then the characters are grooved and rolled according to the adjusted height, width and spacing of the characters.
The height, the length, the width and the spacing of each specification transverse rib are designed according to national standards, the volume V1 of each specification transverse rib is calculated, the optimal design of each character is deduced through V1, and on the premise that the appearance of the character is attractive and the basic size of the character is consistent, the volumes V2 and V1 of each character are ensured to be equal as much as possible, so that the metal flow of the upper surface and the lower surface in the rolling process are basically equal, and the wave bending defect can be further eliminated.
Preferably, the preset height of the characters is 0.6-1.0 times of the height of the transverse ribs, the preset length is 0.7-1.0 times of the length of the transverse ribs, the preset width is 0.8-1.5 times of the width of the transverse ribs, and the preset interval is 1.3-2.0 times of the interval of the transverse ribs.
Optimally, the allowable adjustment ratios of the character height, the character width and the character spacing are +/-20%, +/-25%, +/-50%, respectively.
Further, when the size error of V2 is within ± 10% as compared with V1, the characters can be grooved and rolled without adjusting the height, width and pitch of the characters.
Further, if V1 is not equal to V2 and exceeds the error range, the character height, width and spacing are sequentially adjusted, the height of the character is adjusted first, and when V1 is equal to V2 within the allowable range by adjusting the height, the other parameters are not adjusted.
The rolling process of the ribbed steel bar is as follows: and (3) engraving transverse rib grooves and character grooves on the grooves of the last secondary roller by using a graver, and then rolling the hot steel bar through the roller grooves to form transverse ribs and characters. The cutter for engraving the transverse rib grooves is manufactured according to the requirements of transverse rib parameters, and the size of the cutter is unchanged after the transverse rib parameters are determined. The same cutter is used for engraving the character grooves and the transverse rib grooves on the rolling grooves, and the feed depth of the cutter in the engraving process is the depth of the character grooves or the transverse rib grooves on the rolling grooves, namely the height of the characters or the transverse ribs on the steel bars after rolling is finished. Therefore, the method for adjusting the height and further the volume of the character by adjusting the depth of the tool is the simplest and most effective method.
When the height of the character is adjusted to exceed a certain range and cannot meet the requirement, the character volume can be adjusted by adjusting the character width, so that the character is relatively complex, and the influence of the aesthetic problem after the aspect ratio of the character is changed needs to be considered; the character is limited between the two longitudinal ribs, so that on one hand, the character length adjustment is limited by space, and on the other hand, the character size adjustment is actually performed on the character width adjustment and the character length adjustment, and for simplifying the scheme, only the character width can be regulated; when the requirements can not be met after the height and the width of the characters are adjusted within the allowable adjustment proportion, the space between the characters can be adjusted, and the surface area of the character-rolling side is adjusted through the density of the characters.
In particular, in the invention, the height of the cross rib refers to the distance between the highest point of the upper surface of the cross rib and the base circle surface of the steel bar, the length of the cross rib refers to the distance between two ends of a single cross rib along the circumferential direction of the steel bar, the width of the cross rib refers to the distance between two ends of a single cross rib along the longitudinal direction of the steel bar, and the distance of the cross rib refers to the central distance between adjacent cross ribs; the height of the characters refers to the distance between the upper surfaces of the characters and the base circle surface of the steel bar, the length of the characters refers to the font length of a single character along the circumferential direction of the steel bar, the width of the characters refers to the font width of the single character along the longitudinal direction of the steel bar, and the distance between the characters refers to the center distance between adjacent characters.
Through the adjustment according to the scheme, the bending degree of the rolled finished product of each specification is measured, the bending degree of the finished product can be controlled within the national standard range, the maximum bending degree does not exceed 0.2%, the integral appearance of the finished product of the cooling bed has no obvious wave bending field, the phenomenon that the carved positions of the steel bars are easy to generate wave bending is fundamentally solved, and the method is suitable for the ribbed steel bars of specific models of all specifications.
In conclusion, the method for solving the wave bending of the finished hot-rolled ribbed steel bar product, which is protected by the invention, eliminates the wave bending phenomenon at the lettering position on the steel bar after the steel bar is cooled by optimizing the arrangement of the surface steel seal characters and the transverse ribs, adjusting the size of the characters and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for solving the wave bending of a finished hot-rolled ribbed steel bar product is characterized by comprising the following steps of:
the method comprises the following steps that firstly, the number of transverse ribs is increased in the middle of one side character rolled with a character, the distribution arrangement of the character and the transverse ribs is optimized, two transverse ribs are arranged between steel and trademark characters, two transverse ribs are arranged between a trademark and specification characters, two transverse ribs are arranged between the specification and a three-position character after a production license, the size of the character is regulated, and one character occupies one transverse rib;
secondly, setting the preset height, the preset length, the preset width and the preset interval of the character to be rolled according to the height, the length, the width and the interval of the transverse ribs specified by the national standard design;
thirdly, calculating the volume V1 of the transverse rib of the reinforcing steel bar of each specification, and calculating the volume V2 of the character to be rolled according to the preset height, the preset length and the preset width of the character to be rolled;
fourthly, comparing the sizes of V1 and V2, and if V1 is equal to V2, grooving and rolling the characters according to the preset height, the preset length, the preset width and the preset interval of the characters; if V1 is not equal to V2, the height, width and spacing of the characters are adjusted in sequence within the range of the allowable adjustment ratio until V1 is equal to V2, and then the characters are grooved and rolled according to the adjusted height, width and spacing of the characters.
2. The method of solving the wave-like bending of the finished hot rolled ribbed steel bar according to claim 1 wherein the predetermined height of the characters is 0.6 to 1.0 times the height of the cross ribs, the predetermined length is 0.7 to 1.0 times the length of the cross ribs, the predetermined width is 0.8 to 1.5 times the width of the cross ribs, and the predetermined pitch is 1.3 to 2.0 times the pitch of the cross ribs.
3. The method for solving the wave bending problem of the finished hot-rolled ribbed steel bar product according to claim 1, wherein the allowable adjustment ratios of the character height, the character width and the character spacing are ± 20%, ± 25%, ± 50%, respectively.
4. The method of claim 1, wherein when comparing the V2 with V1, if the size error is within + -10%, the characters can be grooved and rolled without adjusting the height, width and spacing of the characters.
5. The method of claim 4, wherein if V1 is not equal to V2 and the error range is exceeded, the height, width and spacing of the characters are adjusted sequentially, the height of the characters is adjusted first, and when V1 is equal to V2 within the allowable range by adjusting the height, the other parameters are not adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110221752.0A CN113020253A (en) | 2021-02-27 | 2021-02-27 | Method for solving wave bending of finished hot-rolled ribbed steel bar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110221752.0A CN113020253A (en) | 2021-02-27 | 2021-02-27 | Method for solving wave bending of finished hot-rolled ribbed steel bar |
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| CN113020253A true CN113020253A (en) | 2021-06-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168473A (en) * | 2011-01-30 | 2011-08-31 | 莱芜钢铁股份有限公司 | Large-specification ribbed reinforcing steel bars and machining process thereof |
| CN103212575A (en) * | 2013-03-18 | 2013-07-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for eliminating wave warp after through water cooling of hot rolled ribbed steel bar |
| CN106540992A (en) * | 2016-10-25 | 2017-03-29 | 山东钢铁股份有限公司 | A kind of identification method of spiral reinforcement |
| CN107282632A (en) * | 2017-05-08 | 2017-10-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of screw-thread steel finished product ripple glaze optimize technique |
-
2021
- 2021-02-27 CN CN202110221752.0A patent/CN113020253A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168473A (en) * | 2011-01-30 | 2011-08-31 | 莱芜钢铁股份有限公司 | Large-specification ribbed reinforcing steel bars and machining process thereof |
| CN103212575A (en) * | 2013-03-18 | 2013-07-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for eliminating wave warp after through water cooling of hot rolled ribbed steel bar |
| CN106540992A (en) * | 2016-10-25 | 2017-03-29 | 山东钢铁股份有限公司 | A kind of identification method of spiral reinforcement |
| CN107282632A (en) * | 2017-05-08 | 2017-10-24 | 首钢水城钢铁（集团）有限责任公司 | A kind of screw-thread steel finished product ripple glaze optimize technique |
Non-Patent Citations (1)
| Title |
|---|
| 兰方海等: "热轧钢筋竹节弯曲问题改进实践", 《涟钢科技与管理》 * |
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Application publication date: 20210625 |